Workholder



Fll 1931- J. L. PERI'(I NIS ET AL 9 3.24

WORKHOLDER Filed March 11. 192? S Sheets-Sheet 1 v Dgvr Elvroks.

' r M, BY

' ATTORNEY.

Feb. 3, 1931. J. L. PERKINS ET AL 9 12 WORKHOLDER Filed March 11, 1927 5 Sheets-Sheet 5 I i /64 l /6/ INVENTORAS.

Patented Feb 3,1931

PATENT OFFICE JULIAN L. rnnxms, or wrisr srnmermrn, MASSACHUSETTS, ASSIGNOIBS 'ro rnnxms macnnm AND. HIEAM D. CROFT, 0F SPBIFGFIELD, AND GEAR COMPANY, OF

- SPRINGFIELD. MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS WORKHQLDER Application filed March 11, 1927. Serial 110. 174,477.

Our invention relates to im rovements in mechanisms attachable to or orming parts of broaching machines, and more especially broaching machines of the reciprocating ram type, such as that which constitutes the subject matter of Letters Patent of the United States, issued September 13, 1927, No. 1,642,593, and said invention comprises automatically-operated, yielding or springpressed means and mechanism whereby the work is clamped in place and moved into operative position relative to the broaches of the machine, with which this work holder is incorporated, when said broaches in ascending approach or arrive at the upper end of their travel, and moved into'inoperative position and unclamped, when said broaches in descending approach or arrive at the end of their downward travel, a safety device to prevent the action of the parts which move the work-carrying members into broaching P051- tion, in the event the work be not properly or fully seated in the holder, and mechanism for automatically withdrawing the work from the holder after the latter has been returned to initial or loading position at the end of the broaching operation, all peculiarly constructed and combined, together with such other parts and members as may be necessary and desirable in order to render the work holder complete and serviceable in every respect, all as hereinafter set forth.

One object of our invention is to provide a broaching machine, of the type mentioned above, with means for clamping and carrying the work into the paths out of such paths,holding said work rigidly and securely in place during the movement of the same into. and out of said paths and strong, durable,

while said work is being acted on by said broache -"and releasing the work when thesameis moved out of said aths, all being done automatically except t at the cycle of operation of the holder is startedbyhand. The aforesaid means are comparatively SHIP ple, both in construction and operation, yet and not liable to get out of order. 7

Another object is to afi'ord means, in connection with the manually-operated starting of the broaches and mechanism, to preventthe operation of said mechanism to the extent necessary t6 start the cycle of the work holder, in the event the piece of work in the holder is not fully seated therein, whereby are avoided the injury and breakage that would be .liable to occur if the work holder were thrown over into broaching position with said piece impro erly placed.

A further object is to lrnish, in connection with the work holder, an extractor for the work, whereby the same after being broached is automatically removed from said holder.

Other objects and advantages will appear in the course of the following description.

We attain the objects and secure the advantages of our invention by the means and mechanism illustrated in the accompanying drawings, in which- Figure 1v is a top plan of a work holder which embodies a practical form of our invention, and of a broaching machine, such as that hereinbeforereferred to, or the portion of said machine with which said holder is most intimately associated, parts being in section and broken away; Fig.2, a vertical section through the parts and members; shown in the preceding view, taken on lines 2-2, locking in the direction of the associated arrow, in said view;Fig. 3, an outer .or lefthand side elevation of the'tension or locking device for the rock shaft of the holder; Fig. 4, a detail in cross section of the cam and associated parts and members; Fig. 5 aside elevation of a hinge leaf such as is adaptedto beheld by the holder and broached by the machine as here presented; Fig. 6, an edge view of said leaf;'Fig. 7 a front elevation of the work holder and breaching-machine elements, with parts in section and broken away; Fig. .8, a detail, in partial section, of the work-holding parts and members, and'of the safety device; Fig. 9, a detail of the clamp and equalizer; Fig. 10, a right-hand side elevation of the Work holder and machine elements; Fig. 11, a fragmentary detail-of thelower part of the ram, showing the lower dog secured thereto; Fig. 12, a rear elevation of certain of the work-holding members; Fig. 13, a top plan of the extractorshowing the same supported from the ram; Fig. 1 4, a

front elevation, with parts in section and broken away, of the work-engaging members of said extractor; Fig. 15, a right-hand side elevation, generally similar to Fig. 10, but showing the parts and members differently disposed; Fig. 16, a top plan of actuating mechanism for the ram, and, Fig. 17, a side elevation of the reversing elements of said mechanism.

Similar reference characters designate similar parts throughout the several views.

We will first describe briefly the construction and operation of the parts and members of the broaching machine (apart from the W011i: holder) illustrated in connection herewit Mounted to reciprocate vertically on a column 1 is a ram 3, and secured to the front side of said ram is a holder 4 for a central broach 5 and two side broaches 6. The ram 3 is reciprocated bymeans of a rack 7 on one side thereof, and an intermeshing pinion 8 suitably mounted in or supported from a bed 9, and driven from any suitable motor or by any motive power controlled to cause said pinion to be reversed each time said ram arrives at either end of its travel, and thus to reverse the direction of movement on the part of the ram. Secured to the side of the ram 3, opposite to that whereon is located the rack 7, are upper and under dogs 10 and 11, respectively, arranged to impart to a movable member in their paths movement in opposite directions, as said ram reciprocates.

'A shelf 12 has its ends attached to the righthand side of the bed 9, and between said ends said shelf is spaced from said bed. Mounted on the top of the bed 9 and on the shelf 12, respectively, are bearings 13 and 14: for a rock shaft 15. An arm 16 is rigidly attached to the shaft. 15, and extends downwardly between the bed 9 and the shelf 12. The hub of the arm 16 is located on the shaft 15 between the bearings 13 and 14, and an arm 17 is rigidly attached to said shaft between the bearing 13 and the ram 3, and extends up wardly. At the upper end of the arm 17 1s a roll 18, which is located by said arm 1n the paths of travel of the dogs 10 and 1-1.

When the ram 3 descends, the dog 10, as it approaches the lower end of its travel, encounters the roll 18 and aotuates it forwardly, thus rocking the arm 17 on the shaft 15 in the salnedirectlon, and the arm 16 on said shaft in the opposite direction or rearwardly, into the position shown in Fig. 15; and, when said ram ascends, the dog 11, as it approaches the upper end of its travel, encounters said roll and actuates it rearwardly, thus rocking said first-named arm in the same direction, and said second-named arm forwardly, into the position shown in Fig. 10.

Also included with the old structure are a lever 19, a trip 20 for said lever, 'a rocker arm 21 mounted on a stud 22, a hooked link 23, and dogs 24 and 25. The lever 19 is pivotally connected at the rear end, as at 26, with the right-hand side of the bed 9, and

extends forwardly beyond the front side of notch 30 in the upwardly-extending arm of said trip. The dog 25 is pivotally connected at 31 with the arm 21, and has, besides a downwardly-extending finger, an n wardlyextending finger 32 yieldingly held, hymeans of a spring 33, in contact with a lug 34 on said arm. The upper end of the trip 20 is in the path of the dog 25.

The link 23 is mounted at its front end i on the pivot 31, and has a hook at its rear end to engage a pin 35 carried by the arm 16. The pivot 31 and the pin 35 are at the lower ends of their arms, respectively. The dog 24 at its front end is also mounted on the pivot 31. This dog is provided underneath with a spring-pressed shoe 36,

which is pivotally connected at 37 with said dog. The-shoe 36 is a new element rendered necessary in order to avoid breakage or other injury to certain of the parts and members, under certain conditions, as will hereinafter be explained. There is a-longitudinal slot 38 in the bottom of the dog 24 to accommodate the shoe 36, and the upper surface of said shoe is shaped to enable a certain amount of independent movement to take place between said dog and said shoe. A spring 39 is located between the dog 24 and the shoe 36, back of the pivot 37, and normally disposes the dog so that the rear end thereof is well below the corresponding end of the dog. At this the rear end of the dog 24 is a lug 40 to rest and ride on the upper edge of the lever 19.

When the mechanism just described, which is operating mechanism for the work holder,

.wardly from the position shown in Fig. 15.

During the rearward movement of the parts, the dog 25 is carried into a position behind the trip 20. In the event the trip 20 be in the path of the dog 25 when. said dog moves rearwardly, the latter snaps past the former. Now, when the lever 19 is swun upwardly on its pivot 26, the shoe 36 is e evated and iii] ' vented that otherwise might occur.

a screw-threaded stud 47 extends causes the do 24 to swing upwardl on the pivot 31 until the rear .end of sai dog is) in front of the pin 35. At the same time the trip rocks on its pivot 28 and receives the pin 27 in the notch 30, thus supporting the lever 19 in'its raised position and the dog 24 in operative position between the pivot 31 and the pin 35. Next, upon the forward movement of the arm 16, the dog 24 causes the arm 21 to be rocked in the same direction, moving from the position illustrated in Fig. 15 to that illustrated in Fig. 10. At this time the dog 25 encounters the trip 20 and rocks the same to permit the pin 2 the notch into the angle between the arms of said tri and the lever 19 to swing down again. T e dog 24 swings down w1th the lever 19, from the position in front of the pin 35.

Should, at thistime, the arm, 21 be disposed with its lower end so close to the lower end of the arm 16 that the dog 24 could not be swung upwardly into place in front of the pin 35, and at the same time the lever 19 be swung upwardly, said .dog would strike against said pin-from beneath and interfere withthe forward movement of saidgs'econdnamed arm, necessary to the proper relative positioning of the members again, were it not for the fact that the spring 39 then yields and permits the rear-end ortion of said dog'to be forced down,-by t e moving parts above, towards the corresponding end of the shoe 36, until said pin passes clear of said dog. Thus damage and breakage are pre- We will now describe the new work holder and other auxiliary elements, and explain the manner in which they function or operate.

Resting on the bed 9 is a bed 41. The bed 41 isheld in place by bars 42 and 43 fastened to the bed 9 by screws or other means on the leftand right-hand sides, respectively, of

.said first-named bed, and two pairs of bolts 44 which pass through slots 45 in said firstname'd bed into threaded openings in'sald second-named bed. There are. two pairs of slots 45 arranged parallel to thebars 42 and 43, with one slot in front of the other 111 each pair. Projecting downwardly from the front side of the bed 41 is a perforated in 46, and cm the front side of the bed 9 throu h said lu On the stud 47 in front of an behind t e lug 46 are nuts 48-48.

--Up'on loosening-the'bolts 44 and one of the nuts 48, and screwing the other nut 48 onthe stud 47 against the lug 46, the bed 41 is moved for adjustment on the bed 9, either outwardly or inwardly, accordingly as the inner nut or the outernut be turned tomove said lug and with The bed 41 slides between'the bars 42 and 43. After the adjustment has been made the to pass from p stud 22 and increases the frictional resistance it said first-named bed.

/bolts 44 and the loose nut 48 are retightened. The stud 22 is mounted in a bearing 49 in collar 50 which holds said arm on said stud.

The arm 21, like the arm 16, extends down between the right-hand side of the bed 9 and the shelf 12. An ordinary pin 51, for taking up 'wear between the stud 22 and'the hub of the arm 21, is provided, said pin being screwthreaded at the upper terminal to receive a nut 52. "The tightening of the nut 52 on the in 51 draws said pin tightly against the between said stud and the arm hub.

-A hearing 53 is located on the bed 41,

front of the bearing 13 on the bed '41 and w parallel with and a short distance back from I the front edge of said bed, and bolted or otherwise secured to the top of said bearing is a short cap 54 and a long cap 55. A hollow rock shaft 56 is journaled in the bearing 53 beneath the cap 55. Within the shaft-56 is a shaft 57. A trunnionv 58 of a hollow cylinder 100 is journaled in the bearimg"53 beneath the cap 54. The caps 54 and are spaced apart, as alsoare the shaft" 57 and trunnion 58. The trunnion 58 issecured to the shaft 56 by means of a wed e 59 which passes transversely through sai shaft and trunnion.

At the inner end of the shaft 57 is a cam 60. The shaft 57 extends outwardly over the bracket 12, and extending radially from said shaft adjacent to the outer end thereof is a .pin 61. A crank arm or handle 62 has a hub 63'which is mounted on the outer-terminal of the shaft 57, and is notched, as at 64, in the outer side to receive the pin 61. Means are thus afi'orded for rotating the shaft 57 by hand, The hub 63 may be moved inwardly on the shaft 57 until the notched portion thereof is clear of the pin 61, when the handle 62 is permitted to rest inactively against the front edge of the bracket 12. This is the normal position of the handle 62. The shaft '57 directly in front of the hub of the arm 21 is provided with a pinion 65. This pinion may be formed by cutting teeth directly in the shaft 57. The hub of the arm 21 is provided with a segmental-gear 66 which intermeshes with the pinion'65. Mounted on and keyed at67 to the hollow shaft56, inside of the segemental-gear 66, is a hub 68 of a rocker arm 69. The hub 68 is split and the split parts are clamped on the shaft 56 by 'means of a bolt 7 0 and nut 71, in the usual manner. An annular groove. 72 isprovided in the shaft 57 to receive the inner terminal of a." radial pin or screw 73 that extends through the hub 68, is tapped intoxth'e shaft 56, and extends into saidg'roove. The screw 73 assists the key 67 in rigidly securing or fasten .inner end on the cam 60.

movement. A link 7 4 has one end pivotally connected at with the arm 21 above the pin 31, and the other end pivotally connected at 7 6 with the arm 69.

From the foregoing it is clear that, when the arm 21 is rocked rearwardly, the segmentahgear 66 actuates the pinion 65 and rotates the shaft 57 with its cam 60, and, through the medium of the link 7 4:, said arm21 carries with it the arm 69, and said last named arm rocks the shaft 56 to which said last-named arm is rigidly attached; and, that, when said first-named arm is rocked forwardly, said two shafts are actuated in the opposite direction to that in which they were previously actuated. The segmental-gear 66 is of such length and the amount. of movement im parted to the arm 21 is suflicient to cause the pinion 65 to make at least one complete revolution, first in one direction and then in the other, when said arm is oscillated.

A rocker 77 has a hub 78 which is mounted on the hollow shaft 56. and keyed thereto at 7 9. The hub 78 encircles that portion of'the shaft 56 within which is located the cam 60, and the bearing 53 is recessed at 80 to accommodate said hub. The hub 7 8, being in the recess 80, is held and holds the shaft 56, to which said hub is keyed, against endwise movement. A plunger pin or bar 81 is arranged radially in the shaft 56 and the hub 78, and bears at the Bearing on the outer end of the bar 81 is the free terminal of a stifi fiat spring'82 which will presently be described in detail.

The rocker 7 7 is bifurcated at 83 to form a work-locating arm 84 and a shorter, clampcarrying arm 85, the latter being in front of or above the former, according to the position of said rocker. Secured to opposite sides of the arm 84 are two plates 86, the forward or upper edges of which, according to the position of the rocker, and the intermediate side portions of the arm 84 corresponding with one side of ,the work carried by this holder, and together constituting a locating surface for said work. The plates 86 are made of steel and so protect from wear the intermediate surface or surfaces of the arm 84.

This holder is designed to handle hinged leaves, such as is represented at 87, and securely and rigidly to hold one of these leaves in lace while the longitudinal edges thereof and the edges of therecess in one end thereof are being broached. The locating surface above referred to is shaped and proportioned to have placed-thereagainst the side of the hinge leaf 87 inwhich is ,the depression formed by the bend therein, and to provide a suitable support for said leaf when placed on said surface, with the lower end of the leaf resting on a pin 88 which projects from said surface. The pin 88 is set in the arm 84 at the proper place to support the lower end of rreraaa the leaf so that the angle therein coincides with the anglein the locating surface. The arm is slotted, as indicated at 89, ,to receive a clamp 90 which is pivotally connected at 91 with said arm. The terminal portion of the spring 82, which is opposite to the terminal portion of said spring that bears or is adapted to bear on the plunger bar 81, is secured, by means of a clamping plate 92 and two bolts 93, to the forward or upper edge of the clamp 90. The clamp 90 is equipped with an equalizer 94: which is pivotally connected at 95 with said clamp. The equalizer 94 is bifurcated to receive a portion of the clamp 90, and those parts of said equalizer which are adjacent to the locating surface of the arm 84 are adapted, by reason of their shape and proportions, to fit the side of the leaf 87 which is exposed when said leaf is first placed in position on said arm and the pin 88.

When the plunger bar 81 is thrust outwardly by the-high part of the cam 60, it causes, through the-medium of the spring 82, the clamp 90 to be rocked on its pivot 91, with a powerful yet yielding movement, in a manner to carry the equalizer 94 into contact with the leaf 87, and to force said equalizer tightly against said leaf, thereby clamping the same securely in position ready tobe broached. When the high art of the cam 60 passes from beneath the ar 81, said bar,

ing position relative to the leaf 87, but at t e same time affords all the power needed to hold said leaf in place while being broached.

The arm 84 with its wear plates 86, and the eqgializer 94, must not be wider than the leaf 8 in order that said arms and equalizer shall clear the side breaches 6. The plates 86 extend beyond the free end of the arm 84 to afford the necessary support for the leaf and clearance for the broach 5, which breach has'front and side teeth to cut the three sides of the leaf slot. The space between the plates 86 is sufiiciently wide to. admit of the passage t rough the same of the breach 5, so also is 1: 1e space between the sides, at their outer entls of the equalizer 94'. The outer end of he cross piece (136) of the equalizer also isback far enough, when the work holder is irfiabroaching position, to clear present invention, and two wings or guides 157 are attached to the sides of said housing,

directly above the recess between the arms 84 and 85, when the rocker 77 is in loading position, and spaced apart a distance approximately equal to that of an unbroached leaf. The purpose of the guides 157 is to assist the operator in placing the leaf on the locating surface of the arm 84, and insure the placing of said leaf on said surface with equal amounts of longitudinal edge portions. of the leaf projecting beyond said surface. The upper edges of the guides 157 are some distance below the top of the leaf when inplace on the locating surface, consequently said guides do not interfere with the thumb and fingers of the operator when placing the leaf'in the holder. 7

An adjustable positioning bolt 96 is provided to be contacted with by the spring 82, when the bar 81 rides onto the low part of the cam 60, and prevents the clamp 9-0 from sion b swinging inwardly at the top and locating the equalizer 94 in the way of a leaf 87 being introduced into the holder. Due to the fact that for an instant, while the bar 81 is riding from the highpart onto the low part of the cam 60, the spring 82 is not held either by said bar or the bolt 96, a spring 97, Fig. 10, is placed in the slot 89 and interposed between the bottom of said slot and the adjacent edge of the clamp 90 at a point below or behind the pivot 91, according to the position of the rocker 77. The spring 97, having a constant tendency-to rock the lower or rear end of the clamp 90 outwardly, causes the spring 82 to be swung against the bolt 96 as soon as said lastnamed spring ceases to be held under tenthe bar 81.

While the hollow shaft 56 is being rocked in the direction to carry the rocker 77 rearwardly, or from loading position to broaching position, the shaft: 57 is caused to rotate and car the high part of the cam beneath the timed, that, before said rocker arrives in broaching position, the spring 82 is brought under maximum tension by said cam and said bar, and the leaf 87' is firmly and securely clamped between the arm 84 and the equalizer 94,.and. directly after said rocker be ins to move-forwardly into loading position again, said bar ri es onto the lower part of said cam and relieves the tension on said spring, thus bringing about the release of said leaf.

The rearward and downward movement of the rocker 77 is limited by a'restor pillowblock 98 secured by means of screws or otherwise to an upstanding support 99 on the bed 41. The member 99 positions the pillow-block 98 at the proper elevation to receive and support the rocker 77 in a manner properly to present the leaf 87 carried by said rocker to the broa'chu 5 and 6.

When the rocker 77 is forward in loading position, the equalizer 94 is located with its then lower end near enough to the 10- cating surface of the arm 84 to .assist in ar 81, and the parts are so with a set-nut guiding the leaf 87 onto the pin 88, and to prevent said leaf from becoming disengaged from said pin, while the clamping and unclamping operations are taking place.

In theorising" or cylinder 100 is a plunger or latch 101, and said latch has an angular base that projects below the bottom of said cylinder, and is adapted to engage a block 102 secured by means of screws or other-' wise to the bed 41. The latch 101 has a passage which opens into the same from above, and located in said passage, between the bottom'thereof and a cap 103 screwed into the top of the cylinder 100, is a spring 10 1. The spring 104 tends constantly to retain the latch 101'with its angular base in contact with the block 102. A screw 105 is tapped into the front side of the cylinder 100, and at its inner end enters a vertical groove 106 in the adjacent side of the latch 101, and thus said latch is held against rotation in said casing, but is free to move up and down therein." The block102 has two bearing surfaces 107 and 108 for the angular base of the latch 102, said surfaces being so related to each other and to said base that, when the rocker 77 is in its rearward position, one part of said base is in engagement or contact with the surface 107, and, when said rocker is in the forward position, the part of said base is in engagement or contact with the surface 108, as shown in Fig. 3. The cylinder 100, being rigidly connected, by means of the trunnion 58 and the wedge 59.v to the shaft 56, is rocked with said shaft and so causes the spring-pressed latch 101 to snap into engagement first with one of the latch-block surfaces (107 and 108), and then with the other of said surfaces. -The action or effect of the latch on the rocker is, of course, through the shaft 56. The purpose of the latch is to assist in maintaining the rocker in: either of its extreme positions, in pre-' venting rebound or back-lash, and in stabilizing generally the movement of the rocker between the two extremes of its field of operation.

The'contact bolt 96 for the spring 82 is tapped into "and through the front side of the housing .109,- said bolt being provided 110 as usual, outside of said housing. 5 v

The hub 7 8 and the lower portion of the rocker 77 are wider than the upper portions of said rocker, and wider than the arms 84 and 85, and these wide portions are received between upwardly-extending wings 111 at the inner ends'-of the bearing caps 54 and 55. The housing l09nhas rearwardly-extending parts112 which are mounted on and bolted to the caps 54 and 55 on. both sides of the wings 111. The housing 109. at the bottom in front is boltedat 113-113 to the front side of the bearing 53. There isan opening 114 in the front side of the housing 109, near the bottom thereof and between the parts of said housing that are bolted to the bearing 53, and said housing is open behind. A plate 115 forms the top of the housing 109, and may be secured to the sides and front of said housing by means of screws or otherwise.

A. shaft 116 is journaled under the plate 115 in the sides of the housing 109, parallel with the front thereof, and a pinion 117 is mounted on and secured to said shaft. The pinion 117 intermeshes with a rack 118 on the under side of a safety bar 119, which bar is slidingly arranged in the sides 109 beneath the plate 115 and at right-angles to the shaft 116 as best shown in Fig. 7. The bar 119 is of sufficient length and so positioned that, when actuated rearwardly, it passes above the top of the leaf 87 when in proper position in the holder, but encounters said leaf and has its rearward movement thereby checked, in the event the leaf is not in such position or fully seated in said holder. The shaft 116 extends beyond its bearings in the sides of the housing, and is held against longitudinal movement in said bearings b a collar 120 secured to the left-hand terminal of said shaft and a hub 121, of ,a lever or arm 122, outside of said bearings. At 123-423 are represented waysor guides with which the sides of the housing 109 are providedfor the bar 119. The rear-terminal-portion of the bar 119 must be narrower than the space between the sides of the equalizer 94, so as to Y avoid interfering or being interfered with by said equalizer.

Having its upper terminal-bifurcated and pivotally connected at 124 with the operating arm 122 is a vertical rod 125. The rod 125 extends downwardly through an openin as 128, in the bed 41, and is yieldingly retained in its low position b means of a collar 126 secured to said rod he ow said bed, and a spring 127 mounted on said rod between said collar and the bottom edge of said opening. The

opening 128 is wider from front to back than between its sides and so afiords room for whatever forward and backward movement there may be on the part of the rod 125, when the same and its connections are actuated. The downward movement of the arm 122, and consequently of the rod-125, is limited by the bottom (158) of the bifurcation at the to of said rod, against which said arm stops on in contact with which it normally remains, when the arm is swung downwardly on the shaft'116-see Fig. 10.

Ahorizontal bracket129 is bolted or otherwise secured to the front side of the bed 9, and this bracket is provided with two forweirdly-projecting. bearings 130 for a horizontal rock shaft 131. Mounted on and-secured to the shaft 131, outside of the bearings 130, are two rocker arms 132. At their of the housing woman free ends the arms 132 carry a rod 133. In thelower-end portion of the rod 125 is a longitudinal slot 134, and the inner end of the rod 133 extends through said slot. The outer end of the rod 133 extends through a suitable opening provided to receive the same in the lever 19 at the front end.

Upon grasping the arm 122 andrswinging said arm upwardly, the shaft 116 with the pinion 117 thereon is partially rotated. in the direction to actuate the rack 118, with which said pinion intermeshes, rearwardly, and with said rack the safety bar 119. If the leaf 87 is properly seated at this time, the bar 119 is permitted to move rearwardly until the rack 118 encounters a stop pin 135 which projects inwardly from one side of the housing 109 back of said rack, the rear-end portion of said bar then being above said leaf. In the event, however, that the leaf 87 be not fully seated with the lower end on the pin 88, the upper-end portion of said leaf is in the path of the bar 119-, and said bar is thereby prevented from making its full rearward stroke, with the result that the arm 122 can not be swung upwardly far enough to reset the dog 24 and cause the rocker 77 to be thrown into broaching position. But u on subsequently positioning the leaf 87 to c ear the way for the bar 119, the arm 122 can be raised to the full extent. The lever 122, when swung upwardly, carries with it, against. the resihency of the spring 127, the rod 125, nd said rod in turn carries with it the rod 1 3 mounted in the rocker arms 132 on the rock shaft 131, and'the upward movement of said last-named rod causes the lever 19 to swing u wardly on the pivot 26. This movement of t e lever 19,

provided the arm 122 be raised to the full extent, swings the dog 24 u wardly into operativeposition in front 0 the in 35, and the arm 21 is operated to brin a out clamping the work and movement 0% the same into position to be 0 erated on by the breaches.

The slot 134 in t e rod 125 permits said rod to descend as soon as the arm 122 is released, and also enables the lever 19 to be moved-up and down independently in said rod, it being understood that, when the rod is normally dis sod and the lever 19 in its low position, t e rod 133 is in the bottom of the slot 134. The downward movement of the rod 125 and the arm'122 causes the safety .bar 119, through the medium of the shaft 116 the pinion 117, and the rack 11 8, to be moved forward to clear the way from above to the entrance to the space between the locating arm 84 and the equalizer 94. i

To facilitate the removal of the work from the holder after said work has been broached, we provide an extractor which is attached to comprises two movable jaws 137 spaced apart and having their adjacent edges serrated, as shown in Fig. 14. The jaws 137 are arranged and travels with the ram 3. This extractor v screw threaded to receive checknuts 143 above l slot 152, and

the sleeve 140, which nuts limit the downward movement of said stem, and may be adjusted to increase of such movement. Encircling the stem 141, between thebottom of the sleeve 140 and a collar 144 adj ustably secured to said stem by means of a bolt 145, is a spring 146 which has a constant tendency to force the stem downwardly as far as permitted by the nuts 143. In the event the extractor meets with resistance sufficient to overcome the force of the spring 146, the latter yields and permits the stem 141 with the attached parts to move upwardly, thus avoiding undue shock or jar and breakage. The stem 141 is prevented from rotating on its axis in the sleeve 140, by means of a bolt 147 that is tapped into the front side of said sleeve, and has its inner end received in a vertical groove 148 in the corresponding side of said stem. The bolt 147 does notinterfere with the movement of the stem 141 lengthwise. By the means just described, the carrier 138 is supported with its front side parallel with the front of the machine, and directly above the locating arm 84 when the rocker 77 is in loading position, and the jaws 137 are positioned in and by said carrier to receive between them the leaf 87 supported by said arm when the latter is in the aforesaid position, as will presently more clearly appear.

Secured by means of screws or otherwise to the front of the carrier 138 is a cover plate 149, and within said carrier behind said plate is a chamber 150 which opens through the bottom of said carrier, and has side edges forming uides that converge from above downwar l one of which appears at 151 in Fi 14. In the top of the carrier 138 is asloT. 152 sufficient in size to permit a leaf (87) to pass freely through the same. The slot opens into the chamber 150 above the space between the jaws 137. Slidingly arranged in the top of the carrier 138, each side of the having the same inclination as that of the adjacent guide 151, is a rod 153. Secured to the upper-end portion of each rod 153, above the top of the carrier 138, is a collar 154 which limits the downward move mentof said rod. The lower terminal of each rod 153 is inserted in the upper end of one of the jaws 137, and secured theretoby means of a transverse pin 155. Encircling each rod 153, between the top of the jaw 137 attached to said rod and the top .of the chamber 150 is a spring 156, which has a constant or decrease the amount tendency to force said jaw and said rod downwardly as far as the collar 154 permits. The outer, inclined edge of each jaw 137 is ribbed to fit the contiguous guide 151.

When the jaws 137 are in the lowest position permitted by the collars 154, they are closest together, and when said jaws are forced upwardly they separate or are disposed more widely apart. The serrated edges .ofthe'jaws are always approximately parallel.

Normally the jaws 137 are so disposed, by the yielding supporting membeis' therefor, that the space between them is a little less than the width of the broached leaf 87. This insures a sufficiently tight engagement with the leaf by the jaws As the ram 3 approaches the extreme lower end of its travel, and after the dog 11 has caused the work holder to be thro forward into broaching position, and the broached leaf to be unclamped, the jaws 137 are carried-into contact and engagement with the longitudinal edges of said leaf. Where the jaws 137 at their lower ends encounter the leaf 87, the jaws are forced upwardly slightly, against the resiliency of the spring 156, and separate to receive between them said leaf. The jaws descend some distance on the leaf, and grip the same with sufiicicnt force to raise it out of the holder, when said jaws are carried upwardly, as they are immediately upon the reversal of the movement of the ram 3. The leaf remains in the grasp of the jaws 137until they are carried downwardly again with the ram, when the leaf in the grip of the jaws encounters the leaflast inserted in the holder, and said first-named leaf is knocked out of engagement witlrthe jaws which continue to descend until they grasp said last-named leaf preparatory to withdrawing itfrom the holder upon the next upward movement of the ram. In Fig. 14, two leaves are shown in the grasp of the jaws, as they appear just before the upper leaf is dislodged or knocked out by the lower leaf. By providing the machine with this 'ram is descending, encountersthe roll 18, the

arm 17 is rocked forwardly and the arm 16 rearwardly, and, through the medium of the link 23, the arm 21 is also rocked rearwardly. This movement of the arm 21 rocks the rocker "77 forwardly into the loading position shown in Figs. 8, and 15, and rotates the shaft 57 and its cam 60 to theextent required to re lieve the tension on the spring 82 and thus release the leaf 87 which has just been broached. The ram 3 travels downwardly a sufficient distance, after the dog 10 has acted on the arm 17 or has a sufficient amount of overrun, to carry the extractor jaws 137 into gripping relationship with the aforesaid leaf.

The ram 3 is now reversed and commences to move upwardly, when the jaws 137 remove the finished leaf from the holder. Then the operator inserts a second leaf in the holder,

grasps the handle 122. and swings it upwardly. The rod 125 is elevated with the arm 122, against the resiliency of the spring 127, and causes the lever 19 to be swung upwardly, and to locate the dog 24 in operative position in front of the pin 35, in which position said dog is held by said lever, because the latter is now supported in elevated position by the trip 20. The parts, however, fail to locate the dog 24 in operative position, in the event the leaf lastinserted in the holder projects into the path of the safety bar 119, as hereinbefore explained. After raising the ar1n 122, it is released and swings downwardly; by gravity and under the influence of the spring 127 which carries the rod 125 downwardly until said arm encounters the stop 158 formed by the bottom of the slot in the upper terminal of said rod. Next, as the ram approaches the upper end of its travel, the dog 11 encounters the roll 18 and actuates the arm 17 rearwardly and the arm 16 forwardly, and with said last-named arm the arm 21 forwardly, through the medium of the dog 24. The forward movement of the arm 21, through the medium of the cam 60 and the spring 82, brings about the clamping of the leaf last placed on the locating arm 84, and immediately causes the rocker 77 to be rocked rearwardly and downwardly onto the pillowblock' 98, whereby said leaf is positioned in the paths ofthe breaches 5 and 6, ready to be acted on by said broaches when next the ram descends. At the end of the upward travel the ram is reversed and descends, and the broaches carried by said ram make the necessary cuts on the leaf held in their paths. The descending dog 10 brings about a reversal of the work holder and parts, and also causes the leaf in the extractor to be knocked out, when said leaf contacts with the leaf last finished, and causes said extractor to grasp said lastly-finished leaf. The lastly-finished leaf is withdrawn by the extractor from the holder, as soon as the ram again commences to ascend. At the time the arm 21 is swung forwardly, the dog 25 knocks the trip 20 from beneath the pin 27, and the lever 19 is permitted to swing downwardly again. The dog 24 swings downwardly with the lever 19, and is thus removedfrom active or operative to inactive or inoperative position.

In the event the work holder be not loaded ready to be moved into broaching position, at the time the ram arrives at the upper end of its travel, the lever 19 is left in its low position and with it the dog 24, and the arm 16 is actuated, by the action of the dog 11 on the roll 18 and the arm 17, forwardly, with-e out affecting the arm 21 and said holder.

The work-clamping and -holding members can be actuated or operated by hand, whenever occasion requires, simply by moving the handle 62 outwardly to engage the notched part of its hub with the pin 61,- which is the condition shown in the drawings, and rotating the shaft 57 by means of said handle. The link 23 permits the arm 21 to be swung freely rearwardly, when the mechanism is disposed as in Fig. 10, and then as freely forwardly, assuming that the dog 24 is down.

The rocker 77 is preferably provided, on the sides between the axis and'the arms 84 and 85, with troughs 159159. The troughs 159 are formed in the upper ed es of the thicker, hub portion of the rocker 7, and arwear of rubbing or contiguous surfaces, such 4 as the surfaces between the hub wings 111.

Hinge leaves and other work of different shapes and sizes require that the locating surface and equalizer work-engaging surfaces be changed accordingly, and to correspond with the new shape and size in each case.

In Figs. 16 and 17 is illustrated mechanism that may be provided for driving and reciprocating the ram 3, and the same is briefly described as follows, although it is to be understood that the ram may-be driven and reciproeated by means of any one of various other mechanisms.

An electric motor 160 is mounted on abracket 161 which extends to the right from the bed 9 adjacent to the rear end thereof, and a transmission case 162 is mounted on said bednear said end. The motor 160 has a shaft 163 with a gear 164 thereon at the inner terminal, and said gear intermeshes with the gear 165 on the adjacent terminal of-a shaft 166 journaledin' the case 162, both of these shafts being transversely arranged relative to the machine. A longitudinal shaft 167, on the front end of which the pinion 8 is mounted, is journaled in suitable bearings in the bed 9, extends intothewase 162, and is driven from the motor 160 through the medium of the shafts 163 and 166, the intermeshing gears 164 and 165, and the transmission in said case, which transmission is here represented as comprising intermeshing spiral gears 168 and 169 mounted on said shaft 166 and the shaft 167, respectively. Av box 170 is located on the shelf 12 78 and the adjacent tocits rear end, for motor-reversing mechanism connected by suitable electrical conductors with the motor 160. This reversing mechanism is such as is commonly employed for such purposes, and includes a shaft 171 which proJects beyond the lefthand side of the box 170, and a gear 172 secured to saidshaft on the protruding ter-' minal thereof. A reversing rocker arm 173 is mounted on the shaft 15, and has at its rear enda toothed segment 17 4 which intermeshes with the reversing-mechanism gear 17 2, said arm being forward of said gear.

Thearrangement, construction, and timing of parts are such that, when the arm 17 is rocked rearwardly, the arm 173 is rocked downwardly and corresponding motion is imparted to the gear 172 by means of the toothed segment 174; and, when'said arms are rocked'inthe opposite directions, said segment imparts motion in the opposite direction to' said gear. At each movement thus imparted to the gear 172 the motor 160 is reversed and consequently the direction of the ram 3 is changed.

In the present example the arm 173 is mounted on the shaft 15 between the bearing 13 and the hub of the arm 17.

More or less change in the shape, size, con struction, and arrangement of some or all of the parts of this work holder and asso ciated-mechanism, in addition to those hereinbefore specifically pointed out, may be made without departing from the spirit of our invention, or exceeding the scope of what is claimed. r

What we claim as our invention, and desire to secure by Letters Patent, is--'- -1. In operating mechanism for a work holder, oscillatory arms, connecting means between said arms whereby one when act-uated in one direction actuates the other, a movable member adapted to be moved into and out of operative position between said arms, whereby the movement of the first arm in the opposite direction is imparted to the second arm when said member is in operative position, means to support said member in inoperative position and move the same into operative position, and yielding means between said member and said supporting and operating means therefor.

2. In operating mechanism for a work holder, oscillatory arms connected by a link which cases the second arm to be actuated in one direction from the first, but to remain inactive when the first is actuated in the opposite direction, a 'dog pivotally-connected with one of said arms and adapted to be moved into and out of" operative position relative to the other of said arms, whereby the second arm may be moved by the first arm in the aforesaid opposite direction,.said dog being provided with a pivotally connected spring-pressed shoe, and a member on which said shoe rides, said me'mb'er being adapted to move said dog into operative po-'- sition and to permit said dog to move out of such osition. 4

3. 11 operating mechanism for a work holder, oscillatory arms connected by a link which causes the first arm to move the second arm in one direction, a dog ivotally connected with one of said arms an adapted to bemoved into and out of operative position relative to the other of said arms, whereby movement in the opposite direction may be-imparted to said second arm from said first arm, a pivotally mounted lever to sup-.

port said dog and move the same into and out of operative position, a pivotally mounted arm, a rod pivotally connected with said arm, and connecting means between said lever and said rod, whereby the lever is swung upwardly when the rod is carried up wardly by said arm.

4. In operating mechanism for a work holder, oscillatory arms connected by a link which causes the first arm to move the second arm in one direction, a dog pivotally connected with one of said arms and adapted to be moved into and out of operative position relative to the other of said arms, whereby movement in the opposite direction may be imparted to said second arm from said first arm, a pivotally mounted lever to support said dog and move the same into and out of operative position, a pivotally mounted arm, a rod pivotally connected with said arm, said rod having a longitudinal slot in the lower-terminal portion thereof, a suitably-journaled rock shaft provided with. arms, and a rod carried by said arms, said last-named rod being pivotally connected at one terminal with said lever and extending at theother terminal into said slot.

5. In mechanism of the class described, a work holder, mechanism to actuate said work holder from loading position to broaching position, and means to render said mechanism operative when the work is fully seated in said work holder, said means comprising an arm and a shaft for said arm, a safety bar provided with a rack and slidingly arranged in position to encounter the work when not fully seated insaid work holder, and to clear v mechanism to actuate said work hol or from loading position to broaching position, and to cause said clamping means to engage the work, and means to render said mechanism operative when the work is fully seated in said work holder, said means comprising an arm and a shaft for said arm, a safety bar provided with a rackand slidingly arranged and the movement of said arm correspondingly limited, whereby said mechanism fails to be rendered operative.

7. In a work holder, an oscillatory member provided with a receiving and positioning arm for the work, a movable clamp carried by said member to cooperate with said arm in securing the work in place, and means automatically to cause said clamp to engage the work when said member is rocked in one direction, and to release the work when said member is rocked in the opposite direction.

8. In a work holder, an oscillatory member provided with a receiving and positioning arm for the work, a movable clamp provided with a movable equalizer, carried by said member to cooperate with said arm in securing the work in place, and means automatically to cause said clamp to engage the work when said member is rocked in one direction, and to release the work when said member is rocked in the opposite direction.

9. In a work holder, an oscillatory member provided with a receiving and ositioning arm for the work, a clamp carried by and pivotally connected with said member to coo crate with said arm in securing the work in place, said clamp being provided with a pivotally connected equalizer and means automatically to cause said clamp with said equalizer toengage the work when said member is rocked in one direction, and to release the work when said member is rocked in the op posite direction.

10. In a work holder, an oscillatory member provided with a receiving and positioning arm for the work, a movable clamp carried by said member to cooperate with said arm in securing the work in place, and yielding means to cause said clamp to engage the work when said member is rocked in one direction and to release the work when said member is rocked in the opposite direction.

11. In a work holder, an oscillatory member provided with a locating member for the work, a clamping member having a part to engage the work on said locating member, a spring rigidly attached to said clamping member, means to place said spring under tension and rock said clamp into engaging position with the work when said first-named member is actuated in one direction, and to release said spring when said first-named member is rocked in the opposite direction, and means to return said clamping member to disengaging position at the end ofsaid last-named movement of the oscillatory member.

12. In a work holder, an oscillatory member provided with a locating member for the work, a clamping member having a part to engage the work on said locating mem her, a spring rigid-1y attached to said clamping member, means to place said spring under tension and rock said clamp into engaging position with the work when said oscillatory member is actuated in one direction, and to release said spring when said oscillatory member is rocked in the opposite direction, and means in the path of said spring to cause the same to actuate said clamp out of engaging position with the Work, at the 'end of said last-named movement of the oscillatory member.

13. In a work holder, a rock shaft, a rocker arm having integral locating and clamp arms and a clamp movable on said clamp arm.

14. In a work holder, a rock shaft, a rocker mounted on said shaft and providedwith a locating arm and a clamp arm, a clamp pivotally connected with said second-named arm, and an equalizer pivotally connected with said clamp, said equalizer being adapted to engage the work, positioned on said locatmg arm.

15. In a work holder, a rock shaft, a rocker mounted on said shaft, and provided with a locating arm, locating .plates secured to opposite sides of said arm and extending beyond the outer end of the same to admit of the passage between them of a broach, edge portions of said plates serving to form in part the locating surface for the work, and means to clamp the work on said surface.

16. In a work holder, a rock shaft, a rocker mounted on said shaft, and provided with a locating arm and a clamp arm, a clamp pivotally connected with said clamp arm, an equalizer pivotally connected with said clamp, and adapted to engage the work on said locating arm, parts ofsaid equalizer which engage the work being spaced from each other for the passage of a broach, and operating means for said. clamp.

17. In a work holder, a rock shaft, a rocker mounted on said shaft, and having a locating arm and a clamp arm, plates secured to opposite sides of said locating arm, forming parts of the locating surface for the work,

and extending beyond the outer end of said arm to permit a broach to pass between them, a clamp pivotally connected with said clamp arm, an equalizer pivotally connected with said clamp, said equalizer being adapted to engage the work on said locating surface," and having parts. spaced from each other for the passage therebetween of said broach,

and operating means for said clamp.

18. In a work holder, a rock shaft, a rocker mounted on said shaft, and provided with a locating arm and a clam-p arm, said rocker and arms being integral, a clamp pivotally connected with said clamp arm, an equalizer pivotally connected with said clamp, and having a part to assist in supporting the work when the same is placed on said locating arm, and means to actuate. said clamp and cause said equalizer to engage the work and securely hold the same in position on said reaches an extreme locating arm. v

19. In a work holder, an oscillatory member provided with work-engaging and -releasing means, and yielding means to assist in holding said member in either of its extreme positions and operable as the member osition.

20. In a work ho der, an oscillatory member provided with work-engaging and -releasing means, and a spring-pressed latch to assist in holding said member in either of its extreme positions. e

21. The combination, in a work holder, with a suitably 'journaled rock shaft, a rocker secured to said shaft, and provided with 10- eating and clamping means for the work, and an arm also secured to saidshaft, of an operating arm, a link connecting said arms, and means to actuate said operatin arm.

22. The combination, in a wor holder,

' with a suitably journaled rock shaft, a rocker secured to said shaft, and provided with locating and clamping means for the work, an arm also secured to said shaft, an operating arm, a link connecting said arms, and means to actuate said 0 erating arm, 0 yieldin means to assist in holdin said shaft with sa1d rocker at either end o the movement thereof.

23. The combination, in a work holder,

- with a suitably journaled rock shaft, a rockerlsecured to said shaft, and provided with locating and clamping means for the work, an arm also secured to said shaft, an operating arm, a link connecting said arms, and means to actuate said operating arm, of a cylinder secured to said-shaft at one end, a spring-pressed latch in said c linder and projecting therefrom, and ab ock having surfaces adapted to be engaged by said latch when. in either of its two extreme positions.

24. In a work holder, a suitably ournaled hollow rock shaft, a rocker secured to said shaft, a clamp ivotally connected with said" rocker, a sha t journaled 'in said hollow shaft, actuating means means operated by said SecOnd-namedshaft to actuate said clamp into engaging position.

25. In a work holder, a suitably journaled for said shafts, and

hollow rock shaft, a rocker secured to said shaft, a clamp pivotally connected with said rocker, a spring secured to said clamp, a shaft journaled in said hollow shaft, means to actuate said shafts, and means to actuate said spring from said second-named shaft, and causesaid clamp to be moved into engaging position with the work.

26. In a Work holder, a suitably journaled hollow rock shaft,-a rocker secured to said shaft, a clamp pivotally connected with said rocker, an arm also secured to said shaft, a shaft journaled in said hollow shaft, and provided with a pinion, means to actuate said clamp from said second-named shaft mg arm provided witha segmental-gear intermeshing with said pinion, a link pivotally connected with said arms, and actuating means for said 0 crating arm.

' 27. In a workli hollow rock shaft, a rocker secured to said shaft, a clamp pivotally connected with said rocker, a spring secured to said clamp, a shaft journaled in said hollow shaft, and

provided with a cam, a radial member slida cam, and a radial'member slidingly a'rran ed in said hollow shaft and the hub of sai rocker, between said cam and the free terminal. of sa1d spring, of an operating arm f provided with a segmental-gear intermeshmg with said pinion, a link pivotally con nected with said arms, and actuating means for said operating arm.

29. In a work holder, a suitably journaled hollow rock shaft, arocker secured to said shaft, a clamp pivotally connected with said rocker, yielding means to assist in holding said shaft and rocker in either extreme poin said hollow shaft, actuating means for said shafts sition of the same, a shaft journaled and means operated by said second-named shaft to actuate said clamp into engaging position.

30. "In a work holder, a

suitably ournaled hollow rock shaft, a rocker secured to said shaft, a clamp pivotally connected with saidrocker, a spring secured to said clamp, yielding means to assist in holding said shaft and rocker in either extreme position of the same, a shaft journaled in said hollow shaft, means to actuate said shafts, and means-to actuate said spring from said second-named shaft older, a suitably journaled 180' into engagement with the, work, an operat and cause said clamp to be moved into engaging position with the work.

31. In a work holder, a suitably 'journaled hollow rock shaft, a rocker secured to said shaft, a clamp pivotally connected with said rocker, yielding means to assist in holding connected with said two said shaft and rocker in either extreme position of the same, an arm also secured to said shaft, a shaft journaled in said hollow shaft, and provided with a pinion, means to actuate said clamp from said second-named shaft into engagement with the work, an operating arm provided with a segmentalgear intermeshing with said pinion, a link pivotally connected with said arms, and actuating means for saidoperating arm.

32. In a work holder, a suitably journaled hollow rock shaft, a rocker secured to said shaft, a clamp pivotally connected with said rocker, a spring secured to said'clamp, yielding means to assist in holding said shaft and rocker in either extreme position of the same, a shaft journaled in said hollow shaft, and provided with a cam, a radial member slidlngly arranged in said hollow shaft and the hub of said rocker, between said cam and the free terminal of said spring, and operating means for said shafts.

33. The combination, in a work holder, with a suitably journaled hollow rock shaft, a rocker secured to said shaft, a clamp pivotally connected with said rocker, a spring secured to said clamp, yielding means to assist in holding said shaft and rocker in either extreme position of the same, an arm also secured to said shaft, a shaft journaled in said hollow shaft, and provided with a pinion and with ,a cam, and a radial member slidingl arranged in said hollow shaft and the hub of said rocker, between said cam and the free terminal of said spring, of an operating arm provided with a segmental gear intermeshin with said pinion, a link pivotally connected with said arms, and actuating means for said operating arm.

34. The combination, in a work holder, with a suitably journaled hollow rock-shaft, a rocker mounted on and secured to said shaft, a clamp pivotally connected with said rocker, a spring secured to said clamp, a cylinder rigidly secured to said shaft, a spring-pressed latch carried by said cylinder, an arm secured to said shaft, a shaft journaled in said hollow shaft, and provided with a pinion and with a cam, and a sliding member arranged in said hollow shaft and the hub of said rocker, between said cam and the free terminal of said spring, of an operating arm provided with a segmental-gear intermeshing with said pinion, a link pivotally arms, actuatin means for said operating arm, and a block having surfaces adapted to be engaged by said latch when in either of its two extreme positions. 1

said equalizer towards and means to clam 35. In a work holder, a rock shaft, a rocker mounted on said shaft, and having locating and clamp arms, said rocker and arms being integral, a clamp pivotally connected with said clamp arm, an equalizer pivotally connected with said clamp, and a spring arranged to bear on said clamp and tend to rock the same on its pivot in the direction to carry said equalizer towards said locating arm.

36. In a work holder, a rock shaft, a rocker mounted on said shaft, and adapted to be moved between loading and broaching positions, and having locatingnand clamp arms, a clamp pivotally connected with saidclamp arm, an equalizer. pivotally connected with said clamp, a spring secured to said clamp,

means to act on said spring to cause the same to impart to said clamp movement which carries said equalizer towards said locatin arm, and a member in the path of said spring to cause the same torock said clamp in the direction to carry said equalizer away from said locating arm, when said rocker is moved into loading position.

37 In a work holder, a rock shaft, a rocker mounted on said shaft and adapted to be moved between loading and broaching positions, and having locating and clamp arms, a clamp pivotally connected with said clamp arm, an equalizer pivotally connected with said clamp, a spring secured to said clamp, means to act on said spring to cause the same to rock said clamp in the direction to carry said locating arm, an auxiliary spring tending to rock said clamp in the direction to carry said equalizer towards said locating arm, and a member in the path of said first-named spring to cause said spring to rock said clamp in the direction to move said equalizer away from said locating arm, when said rocker is actuated into loading position.

38. The combination, with a work holder, and means to move said work holder between loading and broaching positions, of means to clamp the work in said holder while the same is moving from loading position to broaching position, and to release said work While said holder is moving from broaching 39. The combination, with a work holder, means to move said work holder between loading and broaching positions, and means to clamp the work in said holder while the same is mov'lng from loading position to broaching position, and to release said work while said holder is moving from broaching position to loading position, of automatic means to withdraw the work from the holder while said holder is in loading position.

. 40'. The combination,

position to leading position.

the work in said holder and move the same rom loading to broaching osition, and to move said holder from reaching to loading position-and release said with a workholder,

' ing position, and to move said holder from broaching to loading position and release.

said work, of means movable towards said holder when in loading position, and having parts adapted then to grasp the work, and movable away from said holder with the work in the grasp of said parts, said parts being further adapted, when said last-named means is moved again towards said holder, to have said work removed from them by contact of said work with work lastly placed in the holder.

42. In mechanism of the class described, a

reciprocating ram, a work extractor carried by said ram, a work holder consisting H1 part of clamping means for the work, and means operated from said ram to move said holder between loading and broaching positions, said extractor being adapted to act on the work when said holder is in loading position.

43. In'mechanism of the class described, a reciprocating ram, a work extractor carried by said ram, an oscillatory work holder consisting in part of clamping means for the work, and means operated from said'ram to move said holder between loading and broaching positions, said extractor being adapted to acton the work when said holder is in loading position.

44. In mechanism, of the class described, a reciprocating ram, a work extractor carried by said ram, a work holder consisting in part of clamping means for the work, means operated from said ram to move said holder between loading and broaching positions, and means operated from said ram to actuate said clamping means into engagementwith the work when said holder leaves said loading 7 class described, with a reciprocatin position, and to release the work when said holder approaches said loading position, said extractor eing adapted to act on the work when said holder is in loading position.

45. The combination, in-mechanism of the class described, with a reciprocating ram, and a bracket carried by said ram, of a rod slidingly arranged in said bracket, a carrier attached to said rod, and provided with converging guides, jaws slidingly arranged on said guides, and yielding means normally to retain said aws in their closest relative position.

46. The combination, in mechanism of the guides, and yielding means normally to sup port said jaws in their closest relative position.

v47. In a work holder, a rocker provided with holding means for work, and bearing members for said rocker, the latter having, between its axis and said work-holding means, means to receive waste matter resulting from the broaching operation 7 on the work, and preventing the same from reaching said bearing members.

48. In a work holder, a shaft, and a rocker, provided with holding means for work, mounted on said shaft, and having, between its axis and said work-holding means, means to receive waste matter resulting from the boaching operation on the work, and prevent the same from reaching the bearing members of and for said rocker.

49. In a work holder, bearing members spaced apart, a shaft journaled in said members, and a rocker, provided with holding means for Work, mounted on said shaft, and having, between its axis and said work-holding means, means to receive waste matter resulting from the broaching operation on the work, and prevent the same from. reaching the contiguous surfaces between said rocker and said bearings. J

50. In a work holder, a shaft, and a rocker,

provided with holding means for work, mounted on said shaft, and having, on the sides and between the axis thereof and said work-holding means, troughs adapted to receive waste matter resulting from the broaching operation on the work, and to permit the same to pass away from said rocker, without fouling the bearing members of and for the rocker.

JULIAN L. PERKINS. HIRAM D. CROFT.

ram, and

a bracket secured to said ram, 0 a carrier provided with converging guides yieldin means to support said carrier rom sai bracket, jaws slidingly arranged on said 

